Efficient development "AC Fan", the use of the fan industry, the role and performance of the fan itself, affect many people's choice. Of. In the turbine compressor, the study of three-dimensional flow impeller from the quasi-three-dimensional flow impeller to the full development of three-dimensional flow impeller. And three yuan airflow analysis also developed into a stationary blade diffuser design element in order to achieve maximum efficiency of the unit. Three-dimensional flow impeller centrifugal fan will also get more and more applications. High pressure low flow compressor is a fan manufacturing industry, it is necessary to develop and locked the emergence of new gas seal, developing ultra-high pressure compressor and low flow compressor is the inevitable trend of development.